"These are all happening after less than 1 centigrade degree of global warming. While people in all countries will need to make themselves more resilient to those impacts that cannot now be avoided over the next few decades, the potential risks from unmitigated climate change towards the end of this century and into the next will be very severe, particularly if global warming exceeds 2 centigrade degrees.

"The report warns that, during this century, climate change will increase the risk of human populations being displaced to escape shifts in extreme weather, such as floods and droughts, as well as relatively slow-onset impacts, such as desertification and sea level rise. This report presents a stark case for sharply reducing emissions of greenhouse gases to avoid potentially catastrophic impacts, such as the irreversible melting of the Greenland ice sheet and the resultant rise in sea level, to which we will not be able to make ourselves fully resilient and which lie outside the evolutionary experience of modern Homo sapiens."

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